Thickness / Discussion

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Sub-page of Thickness

--Stefan: Even after the WikiMasterEdit, I feel we should reopen this page for discussion to include the thought provoking thickness concepts currently discussed on rgg. For those who missed the article, it started with a [ext] John Fairbairn message on December 9, 2001.

What we knew (or rather , "were told", let's remain modest ;-) is that atsumi is for attacking, not fencing off territory. We were also taught that the objective of attacking can be killing groups (the objective most of us figure out by ourselves), but more commonly also making territory, gaining further atsumi, or something else that puts us ahead from a point of view of the balance of power and the balance of territory. Now from the above it seems that either: - there is another process than attacking to convert your atsumi in go, which could lead us to new ideas to plan our games; or - the attacking process is largely the same, but it is executed with another objective in mind than the usual ones I heard before.


-- JanDeWit: This page looks strange right now! No line breaks anywhere to be found... In case it matters, I'm using IE5.5 on Win98...

-- TakeNGive: I think it was a copy-n-paste problem -- paragraphs were turned into "preformat" text. I couldn't stand it, so I made it into a "term:definition" list that looks kinda like "blockquote." I hope that's okay.

-- Stefan: That's a neat trick, TakeNGive! I didn't know about that one yet. Thanks for cleaning up my mess :-)


[ext] intro to Part 2 of The Book.


[1]

[Diagram]

Joseki

W8 can also be at the marked point.



In this position the positions of both sides are thick. If W8 is omitted the three outside stones are not thick.

[2]

[Diagram]

Takemiya joseki



Is this outside shape thick or thin, the book asks? It says one point of view is that it is thick because it does not fear attack. It has a cutting point a but a cut leads to the outside player making a wall (this seems to be the only time wall is used in the book!).

[3]

[Diagram]

Joseki



The outside position is thick. However, it is the group as a whole that is thick. Take away the B7 stone and the wall left is not thick.

[Diagram]

Continuation

Furthermore, if White now plays a (a "thick move"), the black outside position is no longer thick.

If White plays not a but W1 and so on to W7, White's position is not thick because of the defect at b.


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